... The shafts we make are six spline, Lemon and threaded hole. The sizes are 1# shafts, 2# shaft ... - 56" b) Six spline, Lemon and keyway threaded hole c) Up to 160HP tractors at 1,000rpmWE HAVE ... The shafts we make are six spline, Lemon and threaded hole. The sizes are 1# shafts, 2# ... b) Six spline, Lemon and keyway threaded hole c) Up to 160HP tractors at 1,000rpm High Quality Agriculture Drive Shafts